Keithley Instruments
Model 4803 Low-Noise Cable Kit
10
Male BNC connectors
CS-44
5
Female BNC chassis-mount connectors
CS-249
1
50 ft length of low-noise coaxial cable
SC-9
1
Pouch
PO-6
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
tek.com/keithley
Instructions
Introduction
The Model 4803 Low-Noise Cable Kit is used to make customized cables to provide low-noise
connections. Sufficient low-noise cables and connectors are included to make additional test cables.
Parts list
Refer to the table below for a list of parts included in the kit.
Quantity Description Keithley part number
Figure 1: Main assembly parts
CS-249 assembly
To assemble a CS-249 female BNC chassis-mount connector:
1. Mount the connector to a chassis or panel with the provided nut and washer.
2. Solder the signal wire to the center contact
PA-100 Rev. D / June 2019 *PPA-100D* 1
Model 4803 Low-Noise Cable Kit Instructions
CS-44 assembly
To assemble a CS-44 male BNC connector:
1. Cut off the end of the cable evenly and remove the cable insulation 1/4 in. from the end, as shown below.
Figure 2: Remove insulation from the cable
2. Slide the nut, washer, gasket, and clamp (or the nut and the nonsealing clamp) over the braided wires.
Figure 3: Preperation of the assembly
3. Flare the braided wires back and trim the braid to 3/32 in. Cut the dielectric 1/8 in. from the braid. Make
sure that you do not damage the inner conductor while trimming the braided wires. The inner conductor
must extend 1/8 in. from the dielectric, as shown below.
Figure 4: Flare braided wire back
2 PA-100 Rev. D / June 2019
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